Contra Costa County Property Tax Rates (FY 2026-27)
In Contra Costa County, the fiscal year 2026-27 property tax rate runs from 1.0498% (Antioch) to 1.4146% (Richmond) across the 45 cities and communities listed here: the 1% Proposition 13 base plus voter-approved bonds.
Rates by city
| City or community | Tax rate (FY 2026-27) |
|---|---|
| Alamo | 1.0957% |
| Alhambra Valley | 1.1526% |
| Antioch | 1.0498% |
| Bay Point | 1.1038% |
| Bayview | 1.2746% |
| Blackhawk | 1.0957% |
| Brentwood | 1.1071% |
| Byron | 1.0995% |
| Camino Tassajara | 1.0957% |
| Castle Hill | 1.0970% |
| Clayton | 1.1038% |
| Clyde | 1.1038% |
| Concord | 1.1038% |
| Crockett | 1.1027% |
| Danville | 1.0957% |
| Diablo | 1.0957% |
| Discovery Bay | 1.0995% |
| East Richmond Heights | 1.2746% |
| El Cerrito | 1.2746% |
| El Sobrante | 1.2746% |
| Hercules | 1.2746% |
| Kensington | 1.2746% |
| Knightsen | 1.0593% |
| Lafayette | 1.0833% |
| Martinez | 1.1691% |
| Montalvin Manor | 1.2746% |
| Moraga | 1.1132% |
| Norris Canyon | 1.0957% |
| North Gate | 1.1038% |
| North Richmond | 1.2746% |
| Oakley | 1.0903% |
| Orinda | 1.1415% |
| Pinole | 1.2746% |
| Pittsburg | 1.1346% |
| Pleasant Hill | 1.1167% |
| Port Costa | 1.1027% |
| Richmond | 1.4146% |
| Rodeo | 1.1027% |
| San Miguel | 1.1038% |
| San Pablo | 1.2746% |
| San Ramon | 1.0957% |
| Saranap | 1.0970% |
| Tara Hills | 1.2746% |
| Vine Hill | 1.1526% |
| Walnut Creek | 1.0970% |
Property tax calculator
Search for a city or pick one on the map, then change the price, rate or fixed assessments to estimate a first-year bill. It uses the same math as Mortgage Blueprint's tax breakdown.
Your property tax bill
The Contra Costa County Treasurer-Tax Collector posts Contra Costa County secured tax bills online: look up or pay a property tax bill. You'll usually need the parcel number (APN).
California secured property tax is billed in two installments: the first is due November 1 and late after December 10; the second is due February 1 and late after April 10. A 10% penalty applies to a late installment.
A bill adds fixed charges to the rate: parcel taxes, Mello-Roos (Community Facilities District) taxes and special assessments such as sewer, flood control or lighting. Those vary by parcel and are not in the rates above. Your true tax rate is the two together, the tax at the city rate plus fixed assessments, divided by the purchase price on a newly purchased home.
Loan limits
Source
Rates from Contra Costa Treasurer-Tax Collector, 2026-27 secured tax bills by TRA. Each rate is for the city's primary or most common tax rate area; other areas in the same city can differ.
Run your numbers for Contra Costa County in Mortgage Blueprint